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Income Tax Disclosure (Tables)

12 Months Ended

Dec. 31, 2024

Income Tax Disclosure [Abstract]

Schedule of Components of Income Tax Expense (Benefit) [Table Text Block]

The income tax provision consisted of the following for the years ended December 31, 2024, 2023 and 2022 (in thousands):

			Year Ended December 31,
			2024						2023						2022
Current:
Federal			$	—					$	—					$	—
State and Foreign			1,314						933						932
			1,314						933						932
Deferred:
Federal			—						—						—
State			—						—						—
Income tax provision			$	1,314					$	933					$	932

Schedule of Effective Income Tax Rate Reconciliation [Table Text Block]

The differences between the effective tax rates reflected in the total provision for income taxes and the U.S. federal statutory rate of 21% for the years ended December 31, 2024, 2023 and 2022, respectively, were as follows (in thousands):

			Year Ended December 31,
			2024						2023						2022
Provision at the U.S. federal statutory rate			$	(4,024)					$	(11,639)					$	(17,076)
Increase (decrease) resulting from:
Nondeductible expenses			1,059						622						215
Statutory to GAAP income adjustment			(34)						28						238
Noncash share-based compensation			2,225						3,221						3,971
Other			275						117						(64)
Foreign withholding taxes			792						705						506
Cancellation of debt income			—						2,272						—
Incremental benefits for tax credits			(1,776)						(1,599)						(1,976)
Change in tax rate/income subject to lower tax rates			(61)						3,208						(865)
Change related to prior tax years			(751)						(774)						(662)
Change in valuation allowance			3,609						4,772						16,645
Income tax provision			$	1,314					$	933					$	932

Schedule of Deferred Tax Assets and Liabilities [Table Text Block]

The tax effects of temporary differences and other tax attributes that give rise to significant portions of the deferred tax assets and liabilities as of December 31, 2024 and 2023 are as follows (in thousands):

			Year Ended December 31,
			2024						2023
Noncurrent deferred taxes:
Property and equipment			$	(374)					$	(869)
Noncash share-based compensation			2,729						3,363
Disallowed interest expense			4,961						7,347
Amortization			1,345						1,850
Operating lease right-of-use assets			(8,821)						(8,818)
Operating lease liabilities			11,830						12,312
R&E tax credit carryforwards			20,060						18,461
Capitalized research and development expenses			32,642						22,575
Deferred revenue			1,240						849
Federal Net Operating Losses ("NOLs")			83,875						90,964
State NOLs			2,244						2,267
State R&E tax credits			4,157						4,157
Foreign NOLs			17,184						15,132
Foreign tax credit carryforward			1,600						2,033
Other			(2,659)						(3,814)
Total noncurrent deferred tax assets			172,013						167,809
Less: Valuation allowance			(171,832)						(167,632)
Total net deferred tax asset			$	181					$	177

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Tabular disclosure of the components of income tax expense attributable to continuing operations for each year presented including, but not limited to: current tax expense (benefit), deferred tax expense (benefit), investment tax credits, government grants, the benefits of operating loss carryforwards, tax expense that results from allocating certain tax benefits either directly to contributed capital or to reduce goodwill or other noncurrent intangible assets of an acquired entity, adjustments of a deferred tax liability or asset for enacted changes in tax laws or rates or a change in the tax status of the entity, and adjustments of the beginning-of-the-year balances of a valuation allowance because of a change in circumstances that causes a change in judgment about the realizability of the related deferred tax asset in future years.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 740
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 9
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482685/740-10-50-9

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Tabular disclosure of the components of net deferred tax asset or liability recognized in an entity's statement of financial position, including the following: the total of all deferred tax liabilities, the total of all deferred tax assets, the total valuation allowance recognized for deferred tax assets.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 740
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482685/740-10-50-2

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Tabular disclosure of the reconciliation using percentage or dollar amounts of the reported amount of income tax expense attributable to continuing operations for the year to the amount of income tax expense that would result from applying domestic federal statutory tax rates to pretax income from continuing operations.

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Reference 1: http://www.xbrl.org/2003/role/exampleRef
-Topic 740
-SubTopic 10
-Name Accounting Standards Codification
-Section 55
-Paragraph 231
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482663/740-10-55-231

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